A disk usage statistics viewer and cleanup tool for Windows
WinDirStat (Windows Directory Statistics) is a disk usage statistics viewer and cleanup tool for Windows. On start up, WinDirStat reads the whole directory tree once and then presents it in three useful views: - The directory list, which resembles the tree view of the Windows Explorer but is sorted by file/subtree size, - The treemap, which shows the whole contents of the directory tree straight away, - The extension list, which serves as a legend and shows statistics about the file types. Visit the WinDirStat blog for more up-to-date information about the program. Note: If you are looking for an alternative to WinDirStat for Linux, then you are looking for KDirStat (apt-get install kdirstat on Debian-derivatives), and the alternative to WinDirStat for MacOS X is Disk Inventory X or GrandPerspective.
Recent versions of Windows offer a very rich file system API, but expose only some of the power in command line utilities or GUI interfaces. The Degel File Utilities will offer a rich file system interface exposing many interesting features of NTFS a
Optimized FindFirstFile, FindNextFile, primarily targetted at Windows.
Xithrae lets you split files into multiple parts, store them anywhere and still be able to access it like the original monolithic file. This could find uses in low HD space situations, archiving, distributing storage, etc. Win32 is the target OS for now.